Richard n



(No Model.)

R. N. DYER.

NIGHT LAMP FOR ELECTRIC LIGHTING SYSTEMS.

No 348,155. Patented Aug. 24, 1886.

W T Hfflm UNITED STATES PATENT OFFICE.

RICHARD N. DYER, OF NE\V YORK, N. Y., ASSIGNOR TO JOHN XV. HO\VELL AND CHARLES S. VAN XUIS, OF NEV BRUNS\VIOK, NEYV JERSEY, AND

DYER & SEELY, OF NEN YORK, N. Y.

NIGHT-LAMP FOR ELECTRIC LIGHTING SYSTEMS.

i I' F forming part of Letters Patent No. 348,155, dated August 24, 1826.

Application filed December Iss5.

Be it known that I, RICHARD N. DYER, of New York city, in the county and State of New York, have invented a certain newand useful Improvement in Night- Lamps for Electric Lighting Systems, of which the following is a specification.

The general object I have in view is to provide an electric nightlamp for use in stores and similarlocations,which will haveareduced incandescence to give pcrmanencyof life to lamp and economy in use of current, such reduced incandesccnce being produced by asimple and efficient arrangement of resistances, iorminga necessary part of the electric lighting-circuit, and hence making unnecessary the expense of special resistances for this purpose.

A specific object is to provide for the automatic lighting and extinguishing of the nightlamp by the act of operating the main switch for lighting and extinguishing simultaneously all or a number of the regular lamps of the store or room in which the night-lamp is located.

The general object is accomplished by utilizing a number of the regular lamps for the current-reducing resistance, the night lamp or lamps being arranged and connected for throwing into and out of series with a number of the regular lamps, the latter being connected in multiple arc with relation to one another. To do this the night-lamp is arranged in a shunt around the switch controlling the circuit to all or a number of the regular lamps. The opening of circuit at this switch throws the nightlamp into series with the regular lamps controlled by the switch. The current of nightlamp will be divided between the several regular lamps,which will not become incandescent, while the night-lamp will show an incandescence less than normal. The opening and closing of the circuit by operating the main switch throws the night'lamp automatically into and out of circuit, the night-lamp being short-circuited when the switch is closed. More than one night-lamp may be located in the shunt around the switch, and if the circuit has current during the day,separate circuit-controllers may be Serial No. 184, 76. (No model.)

provided to turnoff the night-lamps during the day,when the mainswilch is open, by opening the shunt-circuit. \Vhen a double-pole main switch is employed to control the regular lamps, a shunt including one or more nightlamps may be formed around each side of the switch.

In the accompanying drawings, forming a part hereof, Figure 1 is a diagram showing night-lamp arrangement with singlepole main switcluand Fig. 2a similar View showing nightlamp arrangement with double-pole switch.

1 2 is a main circuit, and 3 4: a branch circuit, of a system of electric lighting, thelatter circuit containing incandescing electric lamps A, arranged therein in multiple are.

In Fig. l circuit 3 4 is controlled by a single-pole switch, B, around which isa shunt, 5 (3, including an incandescing electric lamp, 0, and a circuit-controller, a, which may be the key of a socket. This is the night-lamp. A second night-lamp is shown in dotted lines, and may be used when the number of lamps A is such that one night-lamp would have a higher incandescencc than desired.

In Fig. 2 circuit 3 t is controlled by a donble-polc switch, D, shunted on opposite sides by shunts 5 6 and 7 S, containingnight-lamps O O and circuit-controllers a a. The crosseircuits of lamps A preferably have separate circuit-controllers I), so that the number of regular lamps in series with the night-lamp may be regulated or varied by opening more or less of these cross-circuits.

\Vhat I claim is 1. The combination, with an electric lighting-circuit and regular incandescing electric lamps therein in multiple are, of an incandescing electric lamp employed as a nightlamp and connections for throwing the nightlamp into series with a number of the regular lamps, substantially as set forth. 0

2. The combination, with an electric lighting-circuit, regular incandescing electric lamps therein in multiple arc, and a switch controlling the regular lamps sin'mltaneously, of an incandescing electric lamp employed as a night-lamp and connections for throwing the LII night-lamp into and outof series with the regular lamps automatically by the operation; of the switch, substantially as set forth.

3. The combination, with an electric lighti ng-circuit,regnlar incandesciug electric lamps therein in multiple arc, and a switch controlling the regular lamps simultaneously, of an incandcscing electric lamp employed as a night-lamp located in a shunt around the i switch, and thrown into series with the regular lamps when the switch is open, substantially as set forth.

4. The combination, with an electric lighting-circuit,regularincandescing electriclamps therein in multiple are, and a switch controlling the regular lamps simultaneously, of an incandescing electric lamp employed as a night-lamp located in a shunt around the switch, and thrown into series with the regular lamps when the switch is open, and a circuit-controller for making and breaking this shunt, substantially as set forth.

5. The combination, with an electric lighting-circuit, regular incandescing electric lamps therein in multiple arc, and a switch controlling the regular lamps simultaneously, of an incandescing electric lamp employed as a night-lamp located in a shunt around the switch, and thrown into series with the regular lamps when the switch is open, and separate circuit-controllers for the circuits of the regular lamps, whereby the number in series with night-lamp may be regulated or varied, substantially as set forth. 7

6. The combination, with an electric lighting-circuit, regular incandescing electriclamps therein in multiple arc, and a switch controling the regular lamps simultaneously, of an incandescing electric lamp employed as a night-lamp located in a shunt around the switch, and thrown into series with the regular lamps when the switch is open, a circuit- RICHARD N. DYER.

Witnesses:

A. W. KIDDLE, E. C. RO\VLAND. 

